TechCrunch writes, App.net, Dalton Caldwell’s audacious Twitter clone, just reached its $500,000 funding goal on Kickstarter with almost two days to spare. Just a few days ago, it looked unlikely that Caldwell’s user and developer supported ad-free Twitter clone would reach its funding goal. A last-minute push of new sponsors, though, just pushed App.net past its funding goal. The project currently has over 7,500 backers, including almost 6,000 people who used the campaign to pre-pay $50 for an annual App.net membership and just over 50 backers who put down $1,000 for access to the service’s...